Mattress cover



FIG. 1 is a top, right perspective view of a mattress cover showing my new design;

FIG. 2 is a top perspective view thereof; the mattress cover shown flattened, in an extended condition;

FIG. 3 is a top, left, rear perspective view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a top, front perspective view thereof, shown as used on a mattress. 

CLAIM The ornamental design for a mattress cover, as shown and described. 